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Analog Devices Inc. LT1510CGN#TRPBF
- Part No.:
- LT1510CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Chargers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1510CGN#TRPBF.pdf
- Description:
- IC BATT CHG MULTI-CHEM 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,586
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Product details
Overview
LT1510CGN#TRPBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current switching battery charger IC designed for lithium-ion, NiCd, and NiMH batteries. It integrates a 1.5A DC / 2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and precision 0.5% voltage reference. It operates from 8V to 28V input, charges batteries from 2V to 20V, and delivers >87% efficiency at 1.3A in Li-ion applications.
For engineers reviewing the LT1510CGN#TRPBF datasheet, LT1510CGN#TRPBF pinout, LT1510CGN#TRPBF application, or LT1510CGN#TRPBF equivalent, key selection criteria include its 200kHz switching frequency, thermal resistance of 80°C/W in GN package, ±1% OVP accuracy over temperature, soft-start via VC pin capacitor, and shutdown control via VC pin pull-down - all critical for compact, thermally constrained portable battery charging designs.
Technical Context
The LT1510CGN#TRPBF implements current-mode PWM control in a step-down (buck) topology with internal NPN switch and bootstrap-driven BOOST pin. Its dual-loop architecture uses CA1 amplifier to convert sensed current (via 0.1Ω internal sense path between SENSE and BAT) into IPROG current (500µA/A), then compares it against PROG-set reference to regulate charging current.
Voltage regulation is handled by the VA amplifier monitoring OVP pin against the 2.465V reference; when battery voltage reaches the programmed float level (e.g., 4.2V for Li-ion), VA reduces charging current to maintain constant voltage. The IC enters 3µA sleep mode when VCC drops below ~0.7V above VBAT, eliminating reverse battery drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 200 kHz - enables use of small surface-mount inductors (e.g., 10 µH ceramic) and reduces EMI filtering burden. |
| Max Charging Current | 1.5 A DC (2 A peak) - supports fast-charge profiles for single-cell to 5-cell Li-ion or multi-cell NiMH/NiCd packs. |
| Voltage Reference Accuracy | ±0.5% at 25°C, ±1% over –40°C to 125°C - ensures ±42 mV absolute accuracy on 4.2 V Li-ion float voltage. |
| Current Sense Resistance | 0.1 Ω total (SENSE-to-BAT path) - allows simple, accurate current programming with one external resistor (e.g., 4.93 kΩ for 1 A). |
| Thermal Resistance θJA | 80 °C/W - requires careful PCB copper area design under fused corner pins (GN package) to sustain full current at 60°C ambient. |
| Sleep Mode Current | 3 µA typical - prevents measurable battery discharge when wall adapter is unplugged, critical for always-connected devices. |
| Undervoltage Lockout | 7 V (typical) - disables switching until input stabilizes, preventing erratic operation during adapter brownouts. |
Pinout & Package
LT1510CGN#TRPBF is housed in a 16-lead plastic SSOP (GN) package with four fused corner pins connected to the internal die attach paddle for enhanced thermal conduction. PCB land pattern must expand these pins to maximize heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 8, 16) | Ground reference and thermal pad connection | Fused corner pins must be soldered to large copper pour for θJA = 80°C/W performance; shared return for power, sense, and control paths. |
| SW (Pin 2) | Switch output node | Drives external Schottky catch diode; layout must minimize loop area with GND to reduce EMI and switching losses. |
| BOOST (Pin 3) | Bootstrap drive for internal NPN switch | Must be routed with low-inductance path to SW; VBOOST = VCC + VBAT during switch ON; max rating 55 V. |
| SENSE (Pin 5) | High-side current sense input | Connects to one end of internal 0.1 Ω sense resistor; enables ground-referenced battery configuration without current-sense amplifier. |
| VCC (Pins 6, 11, 12) | IC supply input | Requires ≥10 µF low-ESR capacitor near pins; UVLO activates below 7 V; parasitic diode exists from SW to VCC. |
| PROG (Pin 7) | Charging current programming node | Accepts resistor-to-GND or DAC sink current; 2.465 V reference sets IPROG = 2000 × IBAT; shorting to GND halts charging. |
| VC (Pin 9) | Inner-loop PWM control voltage | Soft-start ramp (0.1 µF to GND); shutdown triggered by pulling ≤0.6 V; controls duty cycle and charging current magnitude. |
| BAT (Pin 10) | Current sense return and battery positive | Connects to other end of internal sense resistor; allows direct tie to battery anode; no ground sensing required. |
| OVP (Pin 13) | Voltage regulation feedback input | Compares battery voltage (via R3/R4 divider) against 2.465 V reference; used for CV mode and overvoltage protection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5A switch + 0.1Ω sense | Eliminates need for external MOSFET, gate driver, and discrete sense resistor - reduces BOM count and layout complexity. |
| 0.5% voltage reference | Meets stringent Li-ion float voltage tolerance (±42 mV @ 4.2 V), enabling safe long-term battery maintenance without external trimming. |
| Current sensing at either battery terminal | Supports both high-side (BAT to load) and low-side (battery negative grounded) configurations - simplifies system grounding and isolation. |
| 3 µA sleep current | Prevents measurable self-discharge during adapter removal - essential for consumer electronics with always-connected battery packs. |
| Programmable soft-start via VC pin | 0.1 µF capacitor yields ~3 ms current ramp - avoids inrush stress on input capacitors, battery, and PCB traces during power-up. |
Applications
| Smartphone Fast Charger | Medical Portable Monitor Battery Pack |
|---|---|
Use Scenario: Compact USB-powered Li-ion charger delivering 1.3A to single-cell 3.7V battery in space-constrained smartphone dock. IC Role / Device Role / Timing Role: Constant-current/constant-voltage buck controller regulating charge profile; 200kHz switching enables <2mm height inductor. Use Value: Achieves >87% efficiency at full rate while maintaining ±1% float voltage accuracy - extends runtime and prevents overcharge degradation. | Use Scenario: Dual-battery backup system for portable ECG monitor requiring reliable, low-noise charging with minimal standby drain. IC Role / Device Role / Timing Role: Primary charging controller with automatic CV transition and 3µA sleep mode during AC disconnect. Use Value: Eliminates need for external supervisor IC; fused GN package provides stable thermal performance across clinical operating temperatures (0–40°C). |
| Industrial Handheld Scanner | Power Tool Battery Management |
Use Scenario: Ruggedized barcode scanner using NiMH pack (4.8V, 2.2Ah) charged from 12V vehicle supply with field-replaceable battery. IC Role / Device Role / Timing Role: High-efficiency (≈90%) CC/CV charger with programmable termination; PROG pin accepts microcontroller DAC for adaptive current scaling. Use Value: Single-resistor current setting (e.g., 3.28kΩ for 1.5A) simplifies recalibration after battery aging; OVP pin repurposed for pack overvoltage protection. | Use Scenario: 14.4V NiCd battery pack (12 cells) in cordless drill charged from 24V bench supply with thermal derating. IC Role / Device Role / Timing Role: Step-down charger with thermally aware current limiting; GN package's 80°C/W θJA enables sustained 1.3A output with 60°C ambient. Use Value: Fused corner pins allow direct thermal coupling to metal chassis - avoids heatsink cost while meeting IEC 62368-1 touch-temperature limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charger IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4000IGN#PBF | Wider input range (4.5V–36V), supports multi-chemistry with external FETs; no integrated switch or sense resistor. | Requires external MOSFETs, current sense, and compensation - suited for high-power (>3A) or multi-cell series Li-ion systems. | Select LTC4000 if scalable architecture, programmable charge algorithms, or >20V battery support are required; not drop-in for LT1510CGN#TRPBF. |
| TPS65023RSBR | Triple-output PMIC with integrated Li-ion charger (500mA max), LDOs, and DC/DC converters; 20-pin QFN, no BOOST/SW pins. | Targeted at OMAP/ARM-based embedded systems needing full power management - lacks standalone charger flexibility and high-current capability. | Choose TPS65023 for SoC-centric designs where integration outweighs current capability; incompatible pinout and feature set. |
Compared with LTC4002IGN#PBF and TPS65023RSBR, LT1510CGN#TRPBF offers the simplest, lowest-component-count solution for fixed 1.5A CC/CV charging with integrated switch and sense - ideal when board space, BOM cost, and thermal simplicity are prioritized over programmability or multi-rail power delivery.
Availability
LT1510CGN#TRPBF is available at Aetrix Electronics and suitable for smartphone fast chargers, medical portable monitors, industrial handheld scanners, and power tool battery management systems requiring stable component supply and long-lifecycle support.
Supply support for LT1510CGN#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1510 family was originally developed by Linear Technology (acquired by ADI in 2017) to deliver highly integrated, thermally robust battery charging solutions for portable electronics - emphasizing simplicity, efficiency, and precision voltage regulation in compact packages.
FAQ
What is the maximum battery voltage supported by the LT1510CGN#TRPBF?
The LT1510CGN#TRPBF supports battery voltages from 2V to 20V. This range accommodates single-cell to five-cell lithium-ion packs (up to 21V fully charged), as well as multi-cell NiCd/NiMH configurations. Operation remains stable as long as VBAT stays within this window and VCC exceeds VBAT by ≥2V (for VBAT < 10V) or ≥2.5V (for VBAT > 10V), per the datasheet's supply requirements.
Can the LT1510CGN#TRPBF be used to charge lithium-ion batteries without external termination circuitry?
Yes - the LT1510CGN#TRPBF implements autonomous constant-current/constant-voltage charging for lithium-ion batteries. When configured with appropriate resistor dividers on the OVP pin (e.g., R3/R4), it automatically transitions from CC to CV mode at the programmed float voltage (e.g., 4.2V) and tapers current to zero. No external timer or dV/dt detection is needed for basic Li-ion charging, as confirmed in Figure 2 and Applications Information.
What is the purpose of the BOOST pin on the LT1510CGN#TRPBF, and how should it be routed?
The BOOST pin on the LT1510CGN#TRPBF drives the base of the internal NPN switch transistor to saturation, minimizing on-resistance and conduction loss. It must be connected with a low-inductance, short trace directly to the SW pin. During switch ON, VBOOST ≈ VCC + VBAT, so its voltage rating (55V max) must accommodate that sum. Improper routing causes switching inefficiency, thermal stress, or oscillation.
How does the LT1510CGN#TRPBF achieve 3µA sleep current, and when is it active?
The LT1510CGN#TRPBF achieves 3µA sleep current by disabling internal bias circuits and placing the switch in high-impedance state when VCC falls below ~0.7V above VBAT - typically occurring when the wall adapter is unplugged. In this state, only leakage paths remain active. This behavior is intrinsic to the IC's architecture and requires no external enable/disable signal, making it ideal for battery-backed systems where standby drain must be minimized.
Is the LT1510CGN#TRPBF pin-compatible with the LT1510-5CGN#TRPBF?
No - the LT1510CGN#TRPBF (200kHz version) and LT1510-5CGN#TRPBF (500kHz version) share identical pinout and package (GN), but differ in oscillator frequency, maximum duty cycle (87% vs. 81%), and thermal derating curves. While PCB layout is compatible, the higher-frequency LT1510-5CGN#TRPBF enables smaller magnetics and reduced output ripple, whereas the LT1510CGN#TRPBF offers higher peak duty cycle for wider input–output differentials.
LT1510CGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- -
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Voltage
- Charge Current - Max:
- 1.5A
- Battery Pack Voltage:
- 20V (Max)
- Voltage - Supply (Max):
- 28V
- Interface:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1510CGN#TRPBF FAQ
1.How can I place an order for LT1510CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1510CGN#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1510CGN#TRPBF reliable?
The price and inventory of LT1510CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1510CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1510CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1510CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1510CGN#TRPBF?
LT1510CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1510CGN#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1510CGN#TRPBF?
For technical support, including LT1510CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1510CGN#TRPBF requirements.
6.How does Aetrix verify that LT1510CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1510CGN#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1510CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1510CGN#TRPBF?
All LT1510CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1510CGN#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1510CGN#TRPBF part is unused and in its original packaging.
Return procedure for LT1510CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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